Plasma membrane

Plasma membrane

Chapter 5

Multiple Choice

What is the "big idea" of the Fluid Mosaic Model of plasma membranes?

• the plasma membrane creates a specialized FLUID that looks like a MOSAIC.

• the plasma membrane is a MOSAIC.

• the fluid mosaic model is NOT related to the plasma membrane.

• a plasma membrane is a MOSAIC of components that move FREELY and FLUIDLY.

Multiple Choice

Plasma membranes are selectively permeable. This means

• anything can pass in and out

• the membrane regulates the passage of the material in and out of the cell

• glucose cannot enter the cell

• cholesterol cannot enter

Multiple Choice

Identify cholesterol molecule

• structure a

• structure b

• structure h

• structure i

Multiple Choice

This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?

• the phosphate "head"

• the lipid "tails"

Multiple Choice

According to the rules for passive transport in this image, the osmolytes would move to

• left

• right

Multiple Choice

What is the net movement of substances to regions of lower concentration called?

• Osmosis

• Active transport

• Facilitation

• Diffusion

Multiple Choice

Matthew noticed that his house plants were wilting badly. What cell structure had most likely had contracted?

• capsule

• cell wall

• plasma membrane

• Mitochondria

Multiple Choice

Statements below are true about receptor medited endocytosis EXCEPT .

• It is a specialized type of pinocytosis.

• It is a type of passive transport

• Substance can be acquired even in low quantities in extracellular fluid

• It enables cells to acquire bulk quantities of specific substance.

Multiple Choice

Which form of active transport is being shown?

• Facilitated Diffusion

• Exocytosis

• Endocytosis

• Proton pump